Delta VFDB Series - Manual

N OT E

Before regulating the power voltage, make
sure the power has been turned off. Please set
power voltage as the possible highest voltage
for unstable power system. Take 380VAC
power system for example. If the voltage may
be up to 410Vac, 415VAC should be regulated.

For DELTA’s AC motor drive VFD Series,
please set parameter (Over Voltage Stall
Prevention) as “close” to disable over-voltage
stall prevention, to ensure stable deceleration
characteristic. For VFDB-5055, the jumper
can only be put on the position as shown in the
following figure. Do NOT remove the jumper
to other place.

2 0 0 7 -0 7 - 1 9

5 0 11 6 2 8 4 0 4 -B M 0 4

VFDB Series

Braking Modules Instruction Sheet

X

Preface

Thank you for choosing DELTA’s braking module. VFDB braking units are applied to absorb the motor regeneration energy when the
three-phase induction motor stops by deceleration. With VFDB braking unit, the regeneration energy will be dissipated in dedicated
braking resistors. To prevent mechanical or human injury, please refer to this instruction sheet before wiring. VFDB braking units are
suitable for DELTA AC Motor Drives VFD Series 230V/460V/575V. VFDB braking units need to be used in conjunction with BR series
braking resistors to provide the optimum braking characteristics. VFDB braking units (2015, 2022, 4030, 4045 and 5055) are approved
by Underwriters Laboratories, Inc. (UL) and Canadian Underwriters Laboratories (cUL). The content of this instruction sheet may be
revised without prior notice. Please consult our distributors or download the most updated version at
http://www.delta.com.tw/industrialautomation.

Y

Specifications

VFDB Braking Units

Braking Resistors

Specification

230V Series

460V Series

575V Series

Model no.

Specification

Model VFDB-

2015

2022

4030

4045

5055

BR1K5W005

1500W 5.0

Ω

Max. Motor Capacity (KW)

15

22

30

45

55

BR1K2W6P8

1200W 6.8

Ω

Max. Discharge Current

(A) 10%ED

40 60 40 60

60

BR1K2W008

1200W 8.0

Ω

Continuous Discharge

Current (A)

15 20 15 18

20

BR1K5W040

1500W 40

Ω

O

ut

put

R

at

ing

Braking Start-up Voltage

(DC)

330/345/360/380/400/

415

±

3V

660/690/720/760/800/

830

±

6V

950

±

8V

BR1K0W050

1000W 50

Ω

Input

R

at

ing

DC Voltage

200

—

400VDC 400

—

800VDC

607-1000VDC

BR1K0W075

1000W 75

Ω

Min. Equivalent Resistor for Each

Braking Unit

10

Ω

6.8

Ω

20

Ω

13.6

Ω

15.8

Ω

Heat Sink Overheat

Temperature over +95

℃

(203

o

F)

Alarm Output

Relay contact 5A120VAC/28VDC (RA, RB, RC)

P

rot

ect

ion

Power Charge Display

Blackout until bus (+~-) voltage is below 50VDC

Installation Location

Indoor (no corrosive gases, metallic dust)

Operating Temperature

-10

℃

~+50

℃

(14

o

F to 122

o

F)

Storage Temperature

-20

℃

~+60

℃

(-4

o

F to 140

o

F)

Humidity 90%

Non-condensing

Envi

ronment

Vibration

9.8m/s

2

(1G) under 20Hz

2m/s

2

(0.2G) at 20~50Hz

Mechanical Configuration

Wall-mounted enclosed type IP50

Z

Dimensions

-

Braking Resistors

Z

Dimensions

-

VFDB Braking Units

[

Individual Parts and

Function Explanation

80.0 [3.15]

121.0 [4.76]

18

9.

5 [7

.4

6]

20

0.

0 [7

.8

7]

130.0 [5.12]

R3.3 [R0.13]

A CT.

Y E LLOW

CHA RGE

G RE EN

E RR.
RE D

P owe r Inp ut Cir cu it

+(P) -(N)

，

B ra king Resis to r

B1 B2

，

SL AVE Cir cuit

Fa ult C ircu it

Jump er for inpu t
volt age se tt ing

Terminal Wire Gauge

Circuit

Terminal Mark

Wire Gauge AWG (mm

2

)

Screw

Torque

Power Input Circuit

+(P), -(N)

10~12AWG (3.5~5.5mm

2

)

M4

18 kgf-cm (15.6 in-lbf)

Braking Resistor

B1, B2

10~12AWG (3.5~5.5mm

2

)

M4

18 kgf-cm (15.6 in-lbf)

Output M1,

M2

SLAVE Circuit

Input S1,

S2

20~18AWG (0.25~0.75mm

2

)

(with shielded wires)

M2

4 kgf-cm (3 in-lbf)

Fault Circuit

RA, RB, RC

20~18AWG (0.25~0.75mm

2

)

M2

4 kgf-cm (3 in-lbf)

\

Basic Wiring Diagram

Operation Explanation:

1. For safety consideration, install an overload relay between the braking unit and the braking resistor. In

conjunction with the magnetic contactor (MC) prior to the drive, it can perform complete protection against abnormality.

2. The purpose of installing the thermal overload relay is to protect the braking resistor from damage due to frequent braking, or due to

braking unit keeping operating resulted from unusual high input voltage. Under such circumstance, just turn off the power to prevent
damaging the braking resistor.

3. Please refer to the specification of the thermal overload relay.
4. The alarm output terminals (RC, RA, RB) of the braking unit will be activated when the temperature of the heat sink exceeds 95

o

C. It

means that the temperature of the installation environment may exceed 50

o

C, or the braking %ED may exceed 10%ED. With this kind

of alarm, please install a fan to force air-cooling or reduce the environment temperature. If the condition not due to the temperature,
the control circuit or the temperature sensor may have been damaged. At this time, please send the braking unit back to the
manufacturer or agency for repair.

R/ L1
S/ L2

T/ L 3

N FB

MC

V FD

Ser ies

V FD B

MO T OR

O .L .

U / T 1

V/ T 2

W / T 3

+ P

- N

( )

( )

B1

B2

R A

R C

E. F

D C M

SA

R / L1
S / L2

T / L 3

MC

I M

BR

O .L .

Th e r ma l
O ve r lo a d

R e la y o r
t em pe ra t ur e

s w i tc h

Su rg e

Ab s or be r

T h e rm a l O v er l oa d

R e la y

B r ak i ng

R e si s t or

Br ak i ng

U ni t

+ P

- N

( )

( )

N o te 1: W h en u s in g th e AC d ri v e w i th D C r e a ct o r, p l ea s e r ef e r t o w ir i ng d i ag ra m i n t he AC dr iv e
us e r m an u al f o r t he w i ri n g of t er m i n al + ( P) of Br ak i ng u ni t .

N o te 2:

w ir e te r m i na l - ( N ) t o th e ne u tr al p o in t of p ow e r sy s t em .

Do N O T

Temperature
Switch

5. The AC Motor Drive and braking
unit will be electrified at the same time
while turning on the NFB (No-fuse
breaker). For the operation/stop
method of the motor, please refer to the
user manual of the AC Motor Drives
VFD Series. The braking unit will
detect the inner DC voltage of the AC
motor drive when it stops the motor by
deceleration. The extra regeneration
will be dissipated away rapidly by the
braking resistor in the form of heat. It
can ensure the stable deceleration
characteristic.

6. Besides using thermal overload relay to be the protection system and braking resistor, temperature switch can be installed on braking
resistor side as the protection. The temperature switch must comply with the braking resistor specification or contact your dealer.

]

Wiring Notice

Do not proceed with wiring while power is applied to the circuit.

The wiring gauge and distance must comply with the electrical code.

The +(P), -(N) terminals of the AC motor drive (VFD Series), connected to the braking unit (VFDB), must be confirmed
for correct polarity lest the drive and the braking unit be damaged when power on.

When the braking unit performs braking, the wires connected to +(P), -(N), B1 and B2 would generate a powerful
electromagnetic field for a moment due to high current passing through. These wires should be wired separately from
other low voltage control circuits lest they make interference or mis-operation.

Wiring distance

V FD s e r ie s

1 5~ 5 5k W

2 30 /4 6 0/
5 75 V

M a x 1 0M

Ma x 5 M

BR

VFD B

2 01 5

2 02 2
4 03 0

4 04 5

5 05 5

AC M ot or D riv e

Br aki ng U n i t

B r ak ing R e sis t or

To prevent personal injury, do not connect/disconnect wires or
regulate the setting of the braking unit while power on. Do not touch
the terminals of related wiring and any component on PCB lest users
be damaged by extreme dangerous DC high voltage.

Inflammable solids, gases or liquids must be avoided at the
location where the braking resistor is installed. The braking
resistor had better be installed in individual metallic box with
forced air-cooling.

Connect the ground terminal to the Earth Ground. The ground
lead must be at least the same gauge wire as leads +(P), -(N).

Please install the braking resistor with forced air-cooling or
the equivalent when frequent deceleration braking is
performed (over 10%ED).

The ring terminals are suggested to be used for main circuit
wiring. Make sure the terminals are fastened before power on.

^

Definition for Braking Usage ED%

1 00 %

T0

T1

Bra ki ng Ti me

C y cle Tim e

ED % = T1 /T 0x1 00 (% )

Explanation:

The definition of the barking usage ED(%) is for assurance of

enough time for the braking unit and braking resistor to dissipate away heat
generated by braking. When the braking resistor heats up, the resistance would
increase with temperature, and braking torque would decrease accordingly.

_

The Voltage Settings

1.

Regulation of power voltage: the power source of the braking unit is DC voltage from +(P), -(N) terminals of the AC motor drive. It is
very important to set the power voltage of the braking unit based on the input power of the AC motor drive before operation. The setting
has a great influence on the potential of the operation voltage for the braking unit. Please refer to the table below.

Table 1: The Selection of Power Voltage and Operation Potential of PN DC Voltage

230V Model

AC Power

Voltage

Braking Start-up voltage

DC Bus (+(P), -(N)) Voltage

460V Model

AC Power

Voltage

Braking Start-up voltage

DC Bus (+(P), -(N)) Voltage

575V Model

AC Power

Voltage

Braking Start-up voltage

DC Bus (+(P), -(N)) Voltage

190Vac

330Vdc

380Vac

660Vdc

575Vac

950Vdc

200Vac

345Vdc

400Vac

690Vdc

-

-

210Vac

360Vdc

415Vac

720Vdc

-

-

220Vac

380Vdc

440Vac

760Vdc

-

-

230Vac

400Vdc

460Vac

800Vdc

-

-

240Vac

415Vdc

480Vac

830Vdc

-

-

NOTE: Input Power With Tolerance

±

10%

Input voltage setting for VFDB-2015/2022/4030/4045

Input voltage setting for VFDB-5055

F o r V FD B -4 0 3 0 /4 0 45
F a c to ry s e tt i n g: 4 60 V

F o r V FD B -2 0 15 /2 0 2 2
F a c to ry s e tt i n g: 2 30 V

4 80 V

4 60 V
4 40 V
4 15 V
4 00 V

3 80 V

2 40 V

2 30 V
2 20 V
2 10 V
2 00 V

1 90 V

Inpu t Voltage Set ti ng

C HA RG E

Po wer lamp

A C T

Br aki ng la mp

E R R

Fault lamp

Fo r V FD B- 5 055 S e rie s
Fa c to ry s e tt in g: 5 75 V

-- -- --
5 75 V
-- -- --
-- -- --
-- -- --
-- -- --

Inpu t Vol ta ge Set ti ng

C H A RG E

Power l amp

A C T

Braking lamp

E R R

Fault lamp

2. MASTER/SLAVE setting: The MASTER/SLAVE jumper is set “MASTER” as factory setting. The “SLAVE” setting is applied to two

or more braking units in parallel, making these braking units be enabled/disabled synchronously. Then the power dissipation of each unit
will be equivalent so that they can perform the braking function completely.

The position of the jumper

The SLAVE braking application of three braking units is
shown as the above diagram. After wiring, the jumper of
first unit shall be set as “MASTER” and that of others must
be set as “SLAVE” to complete the system installation.

+ P

- N

( )

( )

V FD

Ser ies

M1

M2

MA STER

B1 B2

O .L .

M1

M2

B1 B2

O .L .

S1

S2

B1 B2

O .L .

S1

S2

SL AVE

SL AVE

BR

BR

BR

+ P

- N

( )

( )

+ P

- N

( )

( )

+ P

- N

( )

( )

-- -- --

5 75 V

-- -- --

-- -- --
-- -- --

-- -- --

2 40 V

2 30 V

2 20 V

2 10 V
2 00 V

1 90 V

MASTER/ SLAVE

Setting Jumper

M1 :
M2 :
S1 :
S2 :

SLAVE output si gnal +
SLAVE output si gnal -

SLAVE i nput signal +
SLAVE i nput signal -

NOTE: Please use shiel ded wir es
whi le wir ing.

Slave
output /input

Terminal

Ala rm ou t pu t te rm ina l s

M

2
M

1
S

2
S

1

RC

RB

RA

MA STER

SL AVE

CH ARG E

Power lamp

AC T

Braking lamp

ERR

Fault lamp

4 80 V

4 60 V

4 40 V

4 15 V
4 00 V

3 80 V

`

All Braking Resistors & Braking Units Use in the AC Drives

Applicable

Motor

V

olta

ge

HP

kW

Full- load

Torque

kg-M

Resistor Value

Spec for Each

AC Motor Drive

Braking Unit

Model VFDB

No. of Units

Used

Braking Resistors

Model and No. of Units

Used

Braking

Torque

10%ED

Min.

Equivalent

Resistor Value

for Each AC
Motor Drive

Typical

Thermal

Overload

Relay Value

20

15

8.248

3000W 10Ω

2015

1

BR1K5W005

2

125

10Ω

30

25

18.5

10.281

4800W 8Ω

2022

1

BR1K2W008

4

125

8Ω

35

30

22

12.338

4800W 6.8Ω

2022

1

BR1K2W6P8

4

125

6.8Ω

40

40

30

16.497

6000W 5Ω

2015

2

BR1K5W005

4

125

5Ω

30

230V

50

37

20.6

9600W 4Ω

2015

2

BR1K2W008

8

125

4Ω

30

20

15

8.248

1500W 40Ω

4030

1

BR1K5W040

1

125

40Ω

15

25

18.5

10.281

4800W 32Ω

4030

1

BR1K2W008

4

125

32Ω

15

30

22

12.338

4800W 27.2Ω

4030

1

BR1K2W6P8

4

125

27.2Ω

20

40

30

16.497

6000W 20Ω

4030

1

BR1K5W005

4

125

20Ω

30

50

37

20.6

9600W 16Ω

4045

1

BR1K2W008

8

125

16Ω

40

60

45

24.745

9600W 13.6Ω

4045

1

BR1K2W6P8

8

125

13.6Ω

50

75

55

31.11

12000W 10Ω

4030

2

BR1K5W005

8

125

10Ω

30

460V

100

75

42.7

19200W 6.8Ω

4045

2

BR1K2W6P8

16

125

6.8Ω

50

20

15

8.248

3000W 60Ω

5055

1

BR1K0W020

3

125

60Ω

15

25

18.5

10.281

4000W 50Ω

5055

1

BR1K0W050

4

125

50Ω

15

30

22

12.338

6000W 40Ω

5055

1

BR1K2W008

5

125

40Ω

20

40

30

16.497

6000W 34Ω

5055

1

BR1K2W6P8

5

125

34Ω

25

50

37

20.6

7500W 25Ω

5055

1

BR1K5W005

5

125

25Ω

30

60

45

24.745

12000W 20Ω

5055

1

BR1K2W008

10

125

20Ω

35

75

55

31.11

12000W 17Ω

5055

1

BR1K2W6P8

10

125

17Ω

45

575V

100

75

42.7

15000W 12.5Ω

5055

2

BR1K5W005

10

125

12.5Ω

45

a

Wiring Examples of Braking Resistors

NOTE: Before wiring, please notice equivalent resistors value shown in the column “Equivalent resistors specification for each braking
unit” in the above table to prevent damage.

230V 20HP

V FD
Series

O .L .

B1

B2

B ra kin g

U n i t

VF DB

2 01 5

Th e r ma l O ve r lo a d

R el a y

VFD150 _2 3_

VF D 1 5 0_ 23 _ us e s wi t h 2PC S BR 1K5 W 0 05 b ra k i n g r e si s t or s i n s e r i e s

+ P

- N

( )

( )

Braki ng

Resistor

+ P

- N

( )

( )

MASTER

230V 25HP/30HP

+ P

- N

( )

( )

O .L .

B r ak i n g

R e s i s t or

B 1

B 2

Braking

Unit

V FD B

2 0 2 2

Th e r ma l O ve r lo a d
R el a y

VFD1 8 5 _2 3 _
VFD2 2 0 _2 3 _

1 . V F D 18 5 _2 3_ u se s w i th t w o B R s e t s i n p a r a l l e l , w h i c h 2 P C S B R 1 K2 W 00 8 br ak i ng r e s i s to rs
in s e ri e s f o r e ac h B R s et .
2 . V F D 22 0 _2 3_ u se s w i th t w o B R s e t s i n p a r a l l e l , w h i c h 2 P C S B R 1 K2 W 6P 8 b ra ki n g r e s is t or s

in s e ri e s f o r e ac h B R s et .

V FD
Se r ies

+ P

- N

( )

( )

+ P

- N

( )

( )

MAST ER

230V 40HP

O .L .

B 1

B 2

Br aki ng
Uni t

V FD B

2 0 1 5

VFD3 0 0 _2 3 _

V FD 3 0 0_ 23 _ us e w ith t w o V FD B 2 0 1 5 br ak i n g u nit s , an d ea c h b ra k ing u n it u se s w ith
2 P C S B R 1 K5 W0 0 5 b ra k ing re s i s to rs i n s er i es .

SLAVE

S 1 S 2

O .L .

B r ak i n g

R e si s t or

B1

B2

B r ak i n g

U ni t

V FD B

2 0 1 5

Thermal Overl oad Relay

M1 M 2

MASTER

V FD
Se r ies

+ P - N

( ) ( )

Thermal Overload Rel ay

B r ak i n g
R e sis t or

+ P - N

( ) ( )

+ P - N

( ) ( )

230V 50HP

O .L .

B 1

B 2

B ra ki ng

U ni t

VF DB

2 01 5

VFD3 70 _2 3_

SLAVE

S 1 S 2

O .L .

Br aki ng
R e si s t or

B 1

B 2

B ra ki n g
U ni t

VF D B

2 01 5

Thermal Ove rloa d Rel ay

M 1 M 2

MASTER

V FD
Se r ies

+ P - N

( ) ( )

Ther ma l Overload Relay

Br ak i ng
R esi st or

+ P - N

( ) ( )

+ P - N

( ) ( )

V FD 3 7 0_ 23_ use s w it h t wo VF D B20 15 b r ak i ng un i t s, a nd e ach br a ki n g un i t u s es w i t h tw o
B R s e ts i n pa ra l l el , w h ich 2 P C S BR 1 K 2W0 0 8 b r a ki ng r e si st o r s i n se r ie s.

460V 20HP

O .L .

Br ak ing
R e si s t or

B1

B2

B ra ki ng
U ni t

VF D B

4 0 30

Th e rma l O v er lo a d
R e la y

VFD150 _43_

VF D 1 5 0_ 43 _ us e s w it h

BR 1K5 W 0 40

1 PC S b ra k i ng

r e s i st o r

+ P

- N

( )

( )

V FD
Series

+ P

- N

( )

( )

MASTER

460V 25HP/30HP/40HP

O .L .

Br a k i n g

U ni t

B1

B2

B ra king

U nit

VFDB

4 03 0

T h e rm a l O v er l oa d

R e la y

VFD185_43 _
VFD220_43 _

VFD300_43 _

1 . V F D 18 5 _4 3_ u s e s w i t h

BR 1 K 2 W 00 8 br ak i n g r es i s t o r s in s e ri e s

2 . V F D 22 0 _4 3_ u s e s

BR 1 K 2 W 6P 8

3 . V F D 30 0 _4 3_ u s e s

BR 1 K 5 W 00 5

4 PCS

w i th 4 PCS

b r a k in g re s i sto rs i n se r i e s

w i th 4 PCS

br ak i n g r es i s to rs i n s er i e s

V F D

Series

+ P

- N

( )

( )

+ P

- N

( )

( )

MASTER

460V 50HP/60HP

O .L .

B r ak i ng

R es i st or

B 1

B 2

B ra ki n g

Uni t

V FD B

4 04 5

Th e r ma l O ve r loa d
R el a y

VFD37 0_43 _
VFD45 0_43 _

1 . V FD 37 0 _4 3_ u se s w i th t w o B R se t s in p ar al l e l , w h i c h 4 PC S B R 1 K2 W 00 8
br ak ing r es is to rs i n s er i es f or e ach BR set .

V FD 4 5 0_ 43 _ use s wi t h tw o BR se ts i n pa r al l el , w h ich 4 PC S B R 1 K2W 6 P8

br ak ing r es is to rs i n s er i es f or e ach BR set .

2 .

V FD
Se r ies

+ P

- N

( )

( )

+ P

- N

( )

( )

MA ST ER

460V 75HP

O .L .

B 1

B 2

Bra ki ng

Un it

V F DB

4 03 0

VF D5 5 0 _4 3 _

V FD 5 50_ 43 _ us e s wit h t wo V F D B 40 3 0 b ra k i ng u ni ts , and ea c h b ra k i ng u ni t u se s wi th
4 P CS B R1 K 5W 0 0 5 b ra k i ng re s i st or s i n s er i es .

SLAVE

S 1 S 2

O .L .

B r ak i ng Re s is t o r

B 1

B 2

B r a k i ng
U ni t

V FD B

4 03 0

Thermal Overl oad Rel ay

M1 M 2

MASTER

V FD
Se r i es

+ P - N

( ) ( )

Thermal Overload Relay

Br ak i ng R e s is t or

+ P - N

( ) ( )

+ P - N

( ) ( )

460V 100HP

O .L .

B 1

B 2

B ra king

U ni t

VFD B

4 04 5

VF D750 _4 3_

SLAVE

S1 S 2

O .L .

B r aki ng
R es is tor

B1

B2

B ra ki ng
U ni t

V FDB

4 04 5

Therma l Ove rload Relay

M1 M 2

MASTER

V FD
Ser ies

+ P - N

( ) ( )

The rmal Overloa d Relay

Br ak ing

Res is t or

+ P - N

( ) ( )

+ P - N

( ) ( )

VFD 7 5 0_ 43 _ us e s with tw o VF DB 4045 b ra kin g un its, a n d e ach b ra kin g un it u ses w it h tw o
BR s e ts in pa ra lle l , w hic h 4PC S B R1 K2 W 6P 8 b ra k ing re si st o rs i n se rie s .

575V 20HP

VF D1 5 0_ 53_ us e s w it h 3P CS BR 1K 0W 0 20 b ra k in g r es is t o rs i n se ri e s

O .L .

Br aking

Re si s tor

B1

B2

B r ak i ng Un i t

VF D B

5 055

Th e rma l O v er lo a d
Re la y

VFD150_53_

VF DS er ies

+ ( P )

- ( N )

+(P )

-( N)

MASTER

575V 25HP

O .L .

Br ak ing
re si sto r

B 1

B 2

Bra ki ng

Unit

VF DB

5 05 5

T h e rm a l O ver lo a d
R e la y

VFD1 85 _53 _

V F D1 8 5_ 53 _ us e s with 5

BR1K 0W 0 50 b ra kin g re si st o rs i n se ri e s

P CS

V FD
Se r ies

+ P

- N

( )

( )

+ P

- N

( )

( )

MASTER

575V 30HP/40HP/50HP

1 . V FD 22 0 _5 3_ u ses w it h 5 P C S B R 1 K2 W 00 8 b r aki ng r es is to rs i n s er ies
2 . V FD 30 0 _5 3_
3 .

u se s w ith 5 P C S B R 1 K2W 6 P8 br a kin g re si st or s in s e ri e s

V FD 3 7 0_ 53 _ us e s w it h 5P CS B R 1K 5W 0 05 b ra kin g re s is t o rs i n s e rie s

O .L .

B r ak ing
R e sis t or

B1

B2

Br ak ing U n i t

VF D B

5 05 5

Th e rma l O ver lo a d
R e la y

VFD22 0_53 _
VFD30 0_53 _
VFD37 0_53 _

VFDS eri es

+ (P )

-( N )

+(P )

-( N )

MASTER

575V 60HP/75HP

1 . V FD45 0 _53_ u se s w i th t wo B R set s in p ar al le l , wh i ch 5 PCS BR1 K2 W 00 8 br ak i ng r es is to rs
in s er ie s f or e ac h BR s et
2 . V FD55 0 _53_ u se s w i th t wo B R set s i n p ar al le l , wh i ch 5 PCS BR1 K2 W 6P8 b ra ki n g re si st or s

in s er ie s f or e ac h BR s et

O .L .

Br ak i ng

R es i s t or

B1

B2

Br ak i ng Un i t

VFD B

5 05 5

Th e rm a l O ve r lo a d

R el a y

VFD450 _53_
VFD550 _53_

VFDSer ies

+ (P )

-( N )

+ (P )

-( N )

MASTER

575V 100HP

VFD7 50 _53 _

B1

B2

V F DB

5 0 55

M1 M 2

MASTER

V F D7 5 0_ 53 _ u s e s w it h t wo VF D B 50 5 5 b ra k i ng u n i t s , a n d e a ch b ra k in g u n i t us e s w i th
5 PC S BR 1 K5 W0 0 5 b r a k i n g r es i s to r s i n s er i es .

VFD
Se r ies

+(P ) - (N )

+(P ) - (N )

O .L .

Th e rma l O v er l oa d
R e la y

T h e r ma l O v er l o a d

R e la y

Br ak i n g

R e si s t o r

Br ak i n g U n i t

Br ak i n g

R e si s t o r

B 1

B 2

V F DB

5 0 5 5

SLAVE

S1 S 2

+( P ) - ( N )

O .L .

B r a k i n g U n i t